Update:
I have been using Squeeze Control for casual/basic music playing on Xbox
One with my Squeezebox Touch in the living room.
The app has been working very stable and the interface with the game
controller is fine (but honestly not ideal)
Nevertheless, it is a big relief that I am now able to control my music
device via the same controller I use for gaming/Netflix/youtube and TV.
My opinion: great value for money with Squeeze Control. It also is a
cross platform purchase on Xbox an PC (say 'play anywhere')